ウランのクエン酸錯体が特定のサイズのカチオンを選択的に捕捉することを確認

ウランのクエン酸錯体が特定のサイズのカチオンを選択的に捕捉することを確認

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先導原子力研究所 津島悟特任准教授の共著論文

“Trimeric uranyl(VI)–citrate forms Na+, Ca2+, and La3+ sandwich complexes in aqueous solution”

が、Chem. Commun. に掲載されました。(DOI: 10.1039/d0cc05460g

詳しくはこちら 

 

<Abstract>

M. Basile, et al.Chem. Commun., 2015, 51, 5306–5309, showed that a sodium ion is sandwiched by uranyl(VI) oxygen atoms of two 3 : 3 uranyl(VI)–citrate complex molecules in single-crystals. By means of NMR spectroscopy supported by DFT calculations we provide unambiguous evidence for this complex to persist in aqueous solution above a critical concentration of 3 mM uranyl citrate. Unprecedented Ca2+ and La3+ coordination by a bis-(η3-uranyl(VI)-oxo) motif advances the understanding of uranium’s aqueous chemistry. As determined from 17O NMR, Ca2+ and more distinctly La3+ cause strong O=U=O polarization, which opens up new ways for uranyl(VI)-oxygen activation and functionalization.